464 Small.—P ollen-presentation Mechanism in the Compositae. 
6 
ISM 
7 
the fusion of the basal appendages, there is the form 
which occurs in Tricholepis , type i6 a , where the 
appendages of each stamen are fused and those of 
neighbouring stamens connate, so that there is 
a continuous sheath of non-polliniferous tissue at 
the base of the staminal tube. 
The very various style forms can be reduced 
to thirteen mean types, around which the numerous 
variations can be grouped. Type I is characteristic 
of the Cichorieae, and the female florets of most of 
the other tribes. The region of the stigmatic pa¬ 
pillae is indicated by the dark line and extends 
from the apex almost to the point of branching. 
The external surface of the style branches is more 
or less hairy. Type II is characteristic of the 
Eupatorieae; the apex of the style branches is 
more or less clavate, the branches vary considerably 
in length, as they do in most of the types, and may 
be reduced to such a form as is shown by Ophyro - 
sporns , type II a . Type III is characteristic of the 
Vernonieae; the style branches are more or less 
rounded and hirsute, with an obtuse apex. Type IV, 
as will be seen from Table II, is the most common 
form of style in the hermaphrodite florets. The 
style branches are flattened or more or less rounded, 
and may be longer or shorter than in the mean 
type ; the stigmatic papillae are marginal and reach 
to the apex, which is truncate or rounded and more 
or less hairy. This type, when it occurs in the male 
flowers of the disc, usually remains closed and un¬ 
branched ; this condition is represented in type V. 
Type VI is characteristic of the male disc florets in 
Calenduleae; it has the style branches very short 
and no stigmatic papillae. 
Type VII is a form similar to type IV, but 
with the apex prolonged into a hairy, more or 
less conical or rounded appendage; the stigmatic 
papillae cease at the base of the appendage. This 
type may have the branches so short that a form 
arises like that of Beilis , type VIE. Type VIII 
is similar, with the appendage more elongated. 
Figs. 3-7. 3 . Piqueria serrata. x 18. 4. Adenostemma viscosum. x 42. 5. Sclerolepis verti- 
cillata. x 10. 6. Eupatorium cannabinum. xi8. 7. Centaurea scabiosa. x 18. 
